The image displays a collection of old Indian paisa coins, including several 20 paise coins, as well as 5 paise and 10 paise coins. Key details about the 20 paise coin: Period and Type: These coins belong to the Republic of India period (1950-date) and were standard circulation coins, though now demonetized. Composition and Shape: Early 20 paise coins (1968-1971) were round and made of nickel-brass or aluminum-bronze, while later issues (1982-1997) were hexagonal and made of aluminum. Design: The obverse typically features the State Emblem of India, while the reverse displays the face value and year of minting. Demonetization: The 20 paise coin, along with other lower denominations, was demonetized on June 30, 2011.